PREFACE
The purpose of this report is to document the detail and data used to estimate thyroid absorbed dose to persons exposed to high levels of early fallout.

The scope of the work was defined by historical records containing environmental
measurement results and testing data for detonations in the Marshall Islands,
particularly reports concerning the Castle BRAVO detonation. The records were
scrutinized and data were subjected to a variety of analyses. The results of

this work show agreement between measured radiological results and the required
radiobiological projections. The new estimated thyroid absorbed dose and the

medical factors relating to health effects in the Marshall Islands may be used
to estimate potential health effects in other populations exposed under similar
conditions.

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